Developer tools

Fern

Website

APIs underpin the internet but are still painful to work with. They are often untyped, unstandardized, and out-of-sync across multiple sources of truth. Fern helps companies deliver SDKs and API documentation that they’re are proud to share with their customers. Since launching in 2023, we’ve been trusted by over 200 customers, including industr

Founded 2022Origin source ↗Checked 2026-11-01

Overview

APIs underpin the internet but are still painful to work with. They are often untyped, unstandardized, and out-of-sync across multiple sources of truth.

Fern helps companies deliver SDKs and API documentation that they’re are proud to share with their customers. Since launching in 2023, we’ve been trusted by over 200 customers, including industry leaders like Square, Webflow, ElevenLabs, Auth0, and Intercom, to power their developer and agent experiences.

We’re fewer than 40 people, based in Brooklyn, NY, and are building open source.

Company description As recorded 2026-11-08
LinkedIn GitHub
Developer toolsAPI platformDevelopersDevelopersSubscription

Founders & team

Previously Fern, fern

Company history As recorded 2026-11-08

Zach Kirsch

Founder

Hey! I'm one of the builders of Fern, where we're making it easier to build APIs. Before Fern, I worked at Palantir as a software engineer.

LinkedIn
Founder profile As recorded 2026-11-01
30team members reported
Source-reported As recorded 2026-11-01

Founded 2022 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthenriched profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedNew York City, NY, USA
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 3 of 6 areas documented

Source-based assessment · automated evidence rules

The source reports an inactive or acquired company; current product identity needs review.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationreachable websitedescriptive evidenceclassified market and modelsourced peoplesourced founding yeardocumentation observed
startup.observe Directory coverage · Sources & method